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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 106
PROCEEDINGS OF THE TWELFTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY
Edited by:
Paper 121

Application of an Optimal Spatial Sampling Technique to Damage Localisation

J.V. Araújo dos Santos1, H. Lopes2, and P. Moreno-García3

1LAETA, IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Portugal
2DEM, ISEP, Instituto Politécnico do Porto, Portugal
3Escuela Superior de Ingeniería, Universidad de Cádiz, Spain

Full Bibliographic Reference for this paper
, "Application of an Optimal Spatial Sampling Technique to Damage Localisation", in , (Editors), "Proceedings of the Twelfth International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 121, 2014. doi:10.4203/ccp.106.121
Keywords: damage localisation, finite differences, beam, optimal spatial sampling, mode shape curvature, modal rotation field..

Summary
A method aimed at improving the localisation of damage in beams based on the use of finite differences is presented in this paper. This improvement is achieved by differentiating modal rotation fields instead of modal displacement fields and by a technique which allows the computation of an optimal spatial sampling to decrease the propagation and amplification of noise and errors. It is shown that by using the optimal spatial sampling the influence of the errors is diminished and relatively little damage can be localised. The results also show that the damage intensity is proportional to the modified curvature damage factor proposed in this paper.

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